Active magnetic regenerator method and apparatus
- Madison, WI
- McFarland, WI
- Deerfield, WI
- Oconomowoc, WI
- Austin, TX
In an active magnetic regenerator apparatus having a regenerator bed of material exhibiting the magnetocaloric effect, flow of heat transfer fluid through the bed is unbalanced, so that more fluid flows through the bed from the hot side of the bed to the cold side than from the cold side to the hot side. The excess heat transfer fluid is diverted back to the hot side of the bed. The diverted fluid may be passed through a heat exchanger to draw heat from a fluid to be cooled. The apparatus may be operated at cryogenic temperatures, and the heat transfer fluid may be helium gas and the fluid to be cooled may be hydrogen gas, which is liquified by the device. The apparatus can be formed in multiple stages to allow a greater span of cooling temperatures than a single stage, and each stage may be comprised of two bed parts. Where two bed parts are employed in each stage, a portion of the fluid passing from the hot side to the cold side of a first bed part which does not have a magnetic field applied thereto is diverted back to the cold side of the other bed part in the stage, where it is passed through to the hot side. The remainder of the fluid from the cold side of the bed part of the first stage is passed to the hot side of the bed part of the second stage.
- Research Organization:
- ASTRONAUTICS CORP OF AMERICA
- DOE Contract Number:
- AC02-90CE40895
- Assignee:
- Astronautics Corporation of America (Milwaukee, WI)
- Patent Number(s):
- US 5249424
- OSTI ID:
- 868942
- Country of Publication:
- United States
- Language:
- English
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Test Results of an Active Magnetic Regenerative Refrigerator
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regenerator
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apparatus
bed
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magnetocaloric
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heat
transfer
fluid
unbalanced
flows
hot
cold
excess
diverted
passed
exchanger
draw
cooled
operated
cryogenic
temperatures
helium
gas
hydrogen
liquified
device
formed
multiple
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allow
span
cooling
single
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portion
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field
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thereto
remainder
multiple stage
fluid passing
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transfer fluid
active magnetic
hydrogen gas
heat exchange
magnetic field
heat exchanger
heat transfer
fluid flow
fluid flows
helium gas
single stage
excess heat
magnetic regenerator
field applied
generator apparatus
regenerator apparatus
multiple stages
magnetocaloric effect
material exhibiting
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